[roll] Roll fuchsia [fxfs] Fix project_id accounting and fsck bugs

Fix several project ID accounting and fsck validation bugs:
1. `Directory::create_child_unnamed_temporary_file` copied project_id
   to the child without merging `{ bytes: 0, nodes: 1 }` into
   `project_usage`. When the file was closed and tombstoned, `trim_some`
   decremented node count, causing persistent -1 node drift.
2. `ScannedStore::process` only incremented node count for directories,
   ignoring `allocated_size` from non-inline extended attributes.
   Include directory `allocated_size` in fsck project usage totals.
3. Only update `stored_project_usages` for root directory records in
   fsck to avoid corrupting root accounting on non-root metadata errors.
   Also warn on negative stored project usage when no nodes exist.

Original-Original-Bug: 562121082
Test: fx -t fuchsia-emulator test fuchsia-pkg://fuchsia.com/fxfs-tests#meta/fxfs-test.cm --test-filter "*project*"
Test: fx -t fuchsia-emulator test fuchsia-pkg://fuchsia.com/fxfs-tests#meta/fxfs-platform-test.cm --test-filter "*project*"
Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1936591
Original-Original-Revision: b88a5f071854af982d2c223ac522c60d29f1608d
GitOrigin-RevId: bb7aab3cdb7392f6bd13c85e1730cd23807afe04
Change-Id: I0ac37092bd0f02d02efe7d375d98ca2e8e1b7990
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1941837
Cr-Commit-Position: refs/heads/main@{#210251}